*{margin:0;padding:0;font-size:14px;font-family: "微软雅黑";box-sizing: border-box;}
html,body{width:100%;height:100%;}
.zoom::after{clear:both;content:'/';height:0;display:block;visibility:hidden;overflow:hidden;}

#xmind{
    width:100%;
    height:100%;
    position: relative;
    overflow: hidden;
    background-color: #FBFBFB;
    z-index:1;
}

.test-btn{position: fixed;top:0px;left:0px;z-index:9999;}
.testDiv{position:absolute;left:50px;top:50px;width:100px;height:100px;background-color:tomato;}





.test-canvas{position: fixed;bottom:0;left:0;width:200px;height:150px;background-color:#fff;z-index:100;}